book Maths Puzzle Numerical Ability

Could you please assist me in the following two questions and show all the work used to get to the answer.


Evaluate: − │─3│

Write one subset of A={1,3,5,7,9,11}.

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book Other Question

The book says "For each pair of functions f and g, determine the domain of the sum, difference, and product of the two functions"-f(x)=1 over x-3 and g(x)=4x^3. I don't even know w RE: BODMAS!!!

I have been given the numbers 3,3,5,7 and asked to use BODMAS to come to the answer 24. I have tried and tried but can not get the answer 24. Can anyone help me??